What Are the Common Causes of PCB Failure?
Ⅰ. What is halogen free PCB?
Printed circuit boards that do not contain halogen elements are called halogen free PCBs. Halogen elements are chlorine, bromine, fluorine, iodine and very that are deadly to life. For pcb printed circuits to be considered "halogen free", the content of chlorine or bromine must be less than 900 ppm, and the total content of halogen materials must be less than 1500 ppm.
For printed circuit board suppliers, the relevant halogen elements (such as chlorine and bromine) do have some benefits.
The advantage of halogen free PCB is that these printed circuit board supplies do not contain health problems because they contain no more than 1500 ppm of chlorine or bromine. When dealing with this type of PCB, it does not affect the environment. This is different from traditional PCBs, which produce dioxins (a toxic chemical substance) when they produce electronic waste.
It is best to avoid large amounts of chlorine or bromine in PCBs. As technology advances, printed circuit board suppliers are developing effective PCBs without the need to use these harmful chemicals.
Ⅱ. What is the cause of PCB failure?
1. Burnt parts
Most pcb printed circuits run very fast, which makes them heat up to very high temperatures. If the space around the circuit board is damaged, this can also cause the PCB to heat up. Each component of the circuit board can only absorb a certain amount of heat before permanently stopping work. This aspect depends entirely on the size and structure of the circuit board components.
2. Environmental factors
If the temperature change is lower than the normal level, the PCB system may malfunction. Such failures are usually seen in outdoor equipment such as swimming pools or hot springs, because their systems have higher currents. With severe temperature changes, the PCB board may warp, and the solder joints may become extremely damaged. At this time, it is almost impossible to try to repair the warped pcb board circuit, and it may be necessary to replace the entire printed circuit board supplies damaged due to weather.
Accumulated moisture and debris are also environmental factors and may cause the printed circuit board to stop working.
3. Poorly manufactured parts
Printed circuit board suppliers have been doing their best to provide only the highest quality components for their systems. Sometimes, poorly manufactured components cannot be avoided, so the system will suffer losses. You can look for signs to determine whether the circuit board components are good. These symptoms may include connection problems, loose components, residual flux, and poor solder.
Cold soldering will cause the solder to deteriorate. This happens when the soldering technician is unable to properly heat the solder to install it to the connection joint. Poor connections may cause more power problems or burned components.